Jump to content

Gorgonops

Moderators
  • Content count

    4197
  • Joined

  • Last visited

2 Followers

About Gorgonops

Profile Information

  • Gender
    Not Telling

Recent Profile Visitors

519 profile views
  1. Apple II Plus Card Identification

    I'm guessing the novation card is a modem; the name of the company rings a bell and it has a connector labeled "phone line" on it. Did you pull the foil stickers off the EPROM windows on three of the cards? Regardless of yes or no I'd strongly suggest you cover them up. A few hours in the sun's worth of UV exposure and you won't have firmware anymore.
  2. Have you gotten your money back? This kind of sounds like the most shady thing ever. Broadly speaking I think that most of the cards you'll run into that don't work in the older AGP G4 towers are AGP 8x or "AGP Pro" cards that you *probably* wouldn't want to upgrade to anyway because they don't have OS 9.x drivers. (People were at one point upgrading those systems with GeForce 5200 cards because that enables Core Image in OS X but, again, the 5200 is basically worthless under 9.) ATI sold a Mac Edition of the 8500 so *if* the card had actually been a functional card with a Mac firmware it should have been fine. What kind of video card does the system have now? If it's at least a Radeon 7500 or GeForce 2/4MX the benefits of upgrading will probably not really justify the cost unless there's some specific video game you want to run better. (A rare scenario on a Mac.) Only if you have a quite early G4 tower with a Rage 128 will you really see much benefit for OS X proper. (Or most productivity software.) If it supports Quartz Extreme it's probably "good enough".
  3. Does anyone have a Mac286 Manual?

    From the 80287 datasheet: So, yeah. I wouldn't touch that jumper unless you specifically find some fault in how it's configured now. The 80287 was sort of a weird beast. The original version basically uses the exact same core as the 8087 designed to pair with the 8086/88 and was limited to lower effective CPU clocks than the 286; by default (IE, with CKM not connected to VCC) it divides the input clock by 3 to run an effective 2/3rds as fast as the main CPU. (The 286 normally divides its input clock in half, IE, an 8mhz 286 is fed with a 16mhz clock.) The CKM pin is there to allow a 287 with a different speed rating to be clocked at some other arbitrary speed with the help of an external clock generator. (The 287 runs asynchronously from the 286, including bus requests, so they can be clocked substantially differently from each other.) Again, I wouldn't try just sticking a jumper on there without knowing exactly how this is implemented on the Mac286 board. (IE, what the effective clock will be if you move the jumper to the other position.) Overclocking a '287 can kill it, the older ones in particular didn't have much headroom.
  4. Does anyone have a Mac286 Manual?

    Norton SI will tell you. https://dosbenchmark.wordpress.com/research/norton-si/ I don't recall ever seeing an fpu enable jumper on any real PC motherboard, but I'll grant it's been a long time. I do remember that some 286 machines had a jumper to adjust the clock for the coprocessor between 1:1 and 2:3 of the main CPU clock. (Long story why.)
  5. How to make GS/OS boot disks?

    Just throwing this out there: GS/OS really doesn't work on a floppy-only machine, especially GS/OS 6.x. It's technically *possible* to sort of run it with disk swapping but it's not very practical. Not to drone on about it too much, but my favorite solution for dealing with a GS without boot media is a2server (available as a pre-packaged VM or easy to install on a Linux PC or Raspberry Pi) plus some sort of Localtalk to Ethernet bridge. With this you can boot *over the network* into a fully-functional GS/OS 6.x installation and use it (with some limitations) just as if it were installed on a hard disk. In theory you could run the VM for this on your modern Mac or PC, but without a Localtalk bridge that doesn't help you. Apple distributed some free software to use an Ethernet-equipped Mac as a bridge, but this says the G3 won't work. You can get a stand-alone bridge off of eBay, but how much one will cost on a given day is a big question mark.
  6. Apple IIGS Variations?

    What I am saying there is that while I AM aware that there is a small selection of Apple IIgs-specific software that runs on the ROM01 but not the ROM03 I am not aware of any differences in compatibility with 8-bit software between the two machines. (IE, so far as I know both are equally good/bad at emulating an Apple IIe.) And then I am further agreeing with you that the IIgs' backwards compatibility seems to be less then perfect regardless of which ROM version it's running because, yes, I have found a not-insigificant number of 8-bit titles that seem to work fine on my IIc (which is the hardware equivalent of an "enhanced" IIe) but fail on the IIgs, despite my IIgs having the supposedly "more-compatible" ROM01. In short, I suspect the problems you're seeing with your text adventure game are generic problems with the IIgs' hardware compatibility that aren't going to be fixed by changing ROMs.
  7. Apple IIGS Variations?

    I only have a ROM01, but to people in the know, is there really that much difference in compatibility with "legacy" Apple ][ software? (In particular, older DOS 3.3 or proprietary-booter software that predates the IIe.) Honestly, just playing with game disks generated off the AIIdiskserver or randomly pulled from Asimov and other such sources it's my general impression that the IIgs is significantly less compatible with this sort of software than my IIc is. (Most of the game disks I make are II+ compatible; I have a II+ as well so that's my baseline.) I actually don't think I've found anything that runs on the II+ but not the IIc, but that's definitely not true in the case of the IIgs.
  8. Apple IIGS Variations?

    I just scanned the top posts in those threads, but what I saw there seems to verify that the "Mark Twain" source is indeed only slightly different from a regular ROM3 and had the same OS 5.x toolsets embedded in it, not updated 6.x ones?
  9. Apple IIGS Variations?

    The only known prototype of a "Mark Twain" IIgs in existence actually identifies itself as "ROM3", so there may in fact be no such thing as finished "ROM4" ROM code. The major difference between the "Mark Twain" motherboard and the previous versions appears to boil down to little more than the prototype having SIMM sockets instead of a memory upgrade card slot and a SCSI controller onboard. (Presumably the SCSI hardware is roughly the equivalent of the slotted "High Speed SCSI card".) My wild guess would be that the prototype probably has a near-verbatim copy of the ROM3 code (which of course doesn't buy you anything) plus the firmware for the SCSI hardware lumped into its onboard ROM so, no, it probably wouldn't work in a ROM3 motherboard, nor would you gain anything from it. All IIgs'es can boot straight to GS/OS assuming you have compatible mass storage hardware, and there are also software solutions for encapsulating at least *some* Apple // games into bundles that can launched from GS/OS. Sort of thought that had actually been discussed at some point. Then I'd suggest that an LC-class Mac with a IIe card would probably be a better fit for your needs.
  10. 4116 memory For Apple II

    Not really, short of pulling them and putting them in a known working machine. If the computer is working well enough to load some diagnostic software you could try that, there are several memory testers out there for Apple II, but they all suffer from the problem that the computer has to *mostly* work to get the diagnostic loaded in the first place. 4116s are pretty easily located online through the usual suspects. In the US I'd suggest this outfit; I haven't done business with them but they have a good reputation: https://www.unicornelectronics.com/ In Europe I have no idea off the top of my head, but I'm guessing good sources. And there's always eBay. It's also pretty trivial to replace 4116s with 4164s (which are still available from mainstream outfits like Jameco) if push really comes to shove: https://atariage.com/forums/topic/257923-replacing-4116-ram-with-4164-for-reliability/ Obviously it won't look stock, but 4164s are actually significantly kinder to your power supply. One of my Commodore PETs has a bank of 4164s replacing the really oddball 4108 chips (basically 4116s with a bad bank relabled as 8k chips) it shipped with.
  11. PCMCIA TV Tuner ?

    90's vintage TV capture cards that used DMA methods to push directly to VRAM (like the very common Brooktree "BTTV"-based cards) have very little latency/lag compared to modern devices that connect via USB. (They're completely synchronous as long as they're running in the direct mode, which on laptops is what ZV port it for.) Running an old video game console through one shouldn't pose a significant problem; you'll probably get more lag from a lot of modern HDTV scalers. That said, the video quality from those devices usually leaves a lot to be desired even when you have a *nice* monitor, and while the PowerBook 2400's LCD was decent for the era I suspect it's only a 12 bit display. Honestly don't know what's to be gained from piping your Sega through it vs. just about any decent TV.
  12. PCMCIA TV Tuner ?

    There's an archive of MacWorld magazines on archive.org that covers the mid-1990's, that might be worth a try, but it's going to be looking for a needle in a haystack.
  13. PCMCIA TV Tuner ?

    What I said was: "identifying a specific card from that era that came with Macintosh drivers is a *really hard thing* to come up with the right Google search string for" Which states that, yes, it is difficult to find "specific card" when you're lacking "right search string" (IE, leaving you flailing to come up with that string from scratch).
  14. Apple IIe without disk drive

    If all you want to do is play games then this will probably keep you amused for a while. Remember of course that only the original ][, ][plus, and IIe actually have the requisite cassette port. IIc and IIgs users are SOL. If you want to actually *do* anything with your IIe then a disk drive or suitable replacement would probably count as a necessity. There was a *fair* body of software for cassette-based ][s and ][plus-es, but a not insignificant amount of it requires Integer Basic, which a IIe can't straightforwardly run without booting a DOS disk and loading it into its built-in equivalent of a language card.
  15. PCMCIA TV Tuner ?

    My answer would be "almost definitely" because I'm fairly certain that those systems supported ZV Port (IE, Zoomed Video) for just that purpose, but it turns out that identifying a specific card from that era that came with Macintosh drivers is a *really hard thing* to come up with the right Google search string for.
×